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You can refer to NCERT Solutions for Class 7 Science Chapter 10 Respiration in Organisms to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.
Class 7 Science Chapter 10MCQ With Answers
Science Class 7 Chapter 10 MCQs On Respiration in Organisms
Choose the correct answer:
Respiration In Organisms Class 7 MCQ Question 1.
Sometimes when we do heavy exercise, anaerobic respiration takes place in our muscle cells. What is produced during this process?
(a) alcohol and lactic acid
(b) alcohol and CO2
(c) lactic acid and CO2
(d) lactic acid only
Answer
Answer: (d) lactic acid only
Class 7 Science Chapter 10 MCQ Question 2.
Yeast is used in wine and beer industries because it respires.
(a) aerobically producing oxygen
(b) aerobically producing alcohol
(c) anaerobically producing alcohol
(d) anaerobically producing CO2
Answer
Answer: (c) anaerobically producing alcohol
Class 7 Science Ch 10 MCQ Question 3.
During the process of exhalation, the ribs move
(a) down and inwards
(b) up and inwards
(c) down and outwards
(d) up and outward
Answer
Answer: (a) down and inwards
MCQ Questions For Class 7 Science Chapter 10 Question 4.
Breathing is a process that
(i) provides O2 to the body.
(ii) breaks down food to release energy.
(iii) helps the body to get rid of CO2
(iv) produces water in the cells.
Which of the following gives the correct combination of functions of breathing?
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (ii) and (iv)
Answer
Answer: (c) (i) and (iii)
Class 7 Respiration In Organisms MCQ Question 5.
Which are the gases involved in breathing?
(a) O2 and NO2
(b) O2 and SO2
(c) O2 and O3
(d) O2 and CO2
Answer
Answer: (d) O2 and CO2
Ncert Class 7 Science Chapter 10 MCQ Question 6.
Name the organ of the body in which the blood is oxygenated.
(a) Heart
(b) Lungs
(c) Lever
(d) Pancreas
Answer
Answer: (b) Lungs
MCQ On Respiration In Organisms Class 7 Question 7.
After heavy exercise, due to the accumulation of which substance we get muscle cramps ?
(a) Malaic acid
(b) Fumaric acid
(c) Lipoic acid
(d) Lactic acid
Answer
Answer: (d) Lactic acid
Respiration In Organisms Class 7 MCQ With Answers Question 8.
Yeasts are used in
(a) wine and beer industry
(b) bakery
(c) in both
(d) none of these
Answer
Answer: (a) wine and beer industry
Respiration Class 7 MCQ Question 9.
In the following figure of respiratory system organs labelled by 1 and 2 are respectively:
(a) Tracheae, Lungs
(b) Lungs, Tracheae
(c) Nasal cavity, Lungs
(d) Lungs, Nasal cavity
Answer
Answer: (a) Tracheae, Lungs
Class 7 Chapter 10 Science MCQ Question 10.
Breathing rate in human beings in normal condition is
(a) 12-15 times in a minute
(b) 15-18 times in a minute
(c) 18-22 times in a minute
(d) 22-25 times in a minute
Answer
Answer: (b) 15-18 times in a minute
Match the following:
| Column A | Column B |
| (i) Unicellular organisms | (a) Skin |
| (ii) Plants | (b) Spiracles |
| (iii) Earthworm, Leech | (c) Cell membrane |
| (iv) Insects | (d) Lungs, skin |
| (v) Frog | (e) Stomata |
| (vi) Mammals | (f) Gills |
| (vii) Fish | (g) Lungs |
Answer
Answer:
| Column A | Column B |
| (i) Unicellular organisms | (c) Cell membrane |
| (ii) Plants | (e) Stomata |
| (iii) Earthworm, Leech | (a) Skin |
| (iv) Insects | (b) Spiracles |
| (v) Frog | (d) Lungs, skin |
| (vi) Mammals | (g) Lungs |
| (vii) Fish | (f) Gills |
Fill in the blanks
1. In higher animals, respiration occurs through ……………….
Answer
Answer: lungs
2. The food has ………………. which is released during ……………….
Answer
Answer: stored energy, respiration
3. Yeasts can survive in the absence of air. They are called ……………….
Answer
Answer: anaerobes
4. The accumulation of ………………. causes muscle cramps.
Answer
Answer: lactic acid
5. The taking in of air rich in oxygen into body is called ……………….
Answer
Answer: inhalation
6. Breathing involves the movement of the ………………. and the ……………….
Answer
Answer: diaphragm, rib-cage
Choose the true and false statements from the following:
1. All living organisms respire to get energy from food.
Answer
Answer: True
2. Cellular respiration takes place in the cells of all organisms.
Answer
Answer: True
3. Muscles can also respire anaerobically.
Answer
Answer: True
4. During heavy exercise the breathing rate declines.
Answer
Answer: False
5. Breathing involves the upward movement of the diaphragm.
Answer
Answer: False
6. The percentage of carbon dioxide is higher in exhaled air in comparison to inhaled air.
Answer
Answer: True
7. Roots take up air from the air spaces present between the soil particles.
Answer
Answer: True
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